om/node_modules/rxjs/_esm5/internal/operators/sampleTime.js

/** PURE_IMPORTS_START tslib,_Subscriber,_scheduler_async PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { Subscriber } from '../Subscriber';
import { async } from '../scheduler/async';
export function sampleTime(period, scheduler) {
    if (scheduler === void 0) {
        scheduler = async;
    }
    return function (source) { return source.lift(new SampleTimeOperator(period, scheduler)); };
}
var SampleTimeOperator = /*@__PURE__*/ (function () {
    function SampleTimeOperator(period, scheduler) {
        this.period = period;
        this.scheduler = scheduler;
    }
    SampleTimeOperator.prototype.call = function (subscriber, source) {
        return source.subscribe(new SampleTimeSubscriber(subscriber, this.period, this.scheduler));
    };
    return SampleTimeOperator;
}());
var SampleTimeSubscriber = /*@__PURE__*/ (function (_super) {
    tslib_1.__extends(SampleTimeSubscriber, _super);
    function SampleTimeSubscriber(destination, period, scheduler) {
        var _this = _super.call(this, destination) || this;
        _this.period = period;
        _this.scheduler = scheduler;
        _this.hasValue = false;
        _this.add(scheduler.schedule(dispatchNotification, period, { subscriber: _this, period: period }));
        return _this;
    }
    SampleTimeSubscriber.prototype._next = function (value) {
        this.lastValue = value;
        this.hasValue = true;
    };
    SampleTimeSubscriber.prototype.notifyNext = function () {
        if (this.hasValue) {
            this.hasValue = false;
            this.destination.next(this.lastValue);
        }
    };
    return SampleTimeSubscriber;
}(Subscriber));
function dispatchNotification(state) {
    var subscriber = state.subscriber, period = state.period;
    subscriber.notifyNext();
    this.schedule(state, period);
}
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